Kvasny Prumysl, 1981 (vol. 27), issue 12
Quality of malts produced from malting and winter barley and the effect of previous crop.Peer-reviewed article
A. DOLE®ALOVÁ, M. HLAVINKOVÁ
Kvasny Prum. 1981; 27(12): 265-268 | DOI: 10.18832/kp1981049 
The cultivation of a spring barley is in a stagnation and is replaced by a winter barley. The reasons are in an economy - mainly yield. Czechoslovak varieties of barley comprises no variety of a winter barley. For our cultivators it means a definite risk due to a damage of plants during the winter. The experiments with high - yield varities of a winter barley showed a worsen barley quality in comparison with the results obtained with a spring barley. Especially the values of extract are below the mean value. The effect of prestable on the quality is significant. The results of many experiments show that the better quality and higher yields are achieved...
Gramnegative bacteria contaminating beer.Peer-reviewed article
O. BENDOVÁ, V. KURZOVÁ
Kvasny Prum. 1981; 27(12): 268-271 | DOI: 10.18832/kp1981050
A review of present opinions on the significance of gramnegative bacteria contaminating beer production is given. Some microorganisms from the family Enterobacteriaceae including Enterobacter agglomerans, which had not been taken into account in this connection in the past, bacteria from the genus Acetobacter, Zymomonas and recently described strictly anaerobic rods of Pectinatus cerevisiiphilus and cocci from the genera Megasphaera are discussed.(In Czech, English summary only)
Comparison of growth and physiological characteristics of cells in different types of fermentors. II. Effect of glucose concentration in medium input.Peer-reviewed article
J. PÁCA
Kvasny Prum. 1981; 27(12): 272-276 | DOI: 10.18832/kp1981051
Growth and physiological characteristics of the cells Klebsiella aerogenes at steady states of continuous cultures performed in onestage and multistage tower fermentor in dependence on glucose concentration in the medium input are compared. Experiments were carried out in the minimum synthetic medium under constant values of pH 7,0, temperature of 30 °C, KLa of 176 h-1 and dilution role of 0,6 h-1. The biomass and glucose concentrations, biomass yields referred to carbon and energy source and to oxygen used, productivity, respiration rates and changes in respiratory quotient were measured. The results showed that the...
Biosynthesis of L-lysine produced by the Corynebacterium glutamicum strain in media consisting of wood hydrolysate and acetic acid. Part II. Two-stage fermentation.Peer-reviewed article
F. SMÉKAL, J. PELECHOVÁ, V. KRUMPHANZL
Kvasny Prum. 1981; 27(12): 276-278 | DOI: 10.18832/kp1981052
During a cultivation of the strain Corynebacterium glutamicum 7/11 on saccharose or molasses medium with an addition of a mixture containing the concentrated wood hydrolysate and acetic acid, L-lysine is accumulated in the broth. The results from shake flask cultivations were verified in 2-litre fermenters. With the optimum composition of a carbon source mixture, a proper dose-interval and a quantity of the mixture, the production of 36 -48 g L-lysine per litre of the cultivation broth was obtained during 92 hours.(In Czech, English summary only)
New thermotolerant yeast strains growing on ethanol.Peer-reviewed article
L. ADÁMEK, M. ©ESTÁKOVÁ, J. RYBÁŘOVÁ, F. ©TROS
Kvasny Prum. 1981; 27(12): 278-280 | DOI: 10.18832/kp1981053
The effect of cultivation temperature in the range from 30 to39 °Con growth rates, contents of nitrogen and nucleic acids in biomass and yield coeffitient was studied in two pilot-plat strains of yeasts Torulopsis ethanolitolerans (RIFIS 235) and Candida utilis (RIFIS 231), producers of fodder proteins from synthetic ethanol. In the temperature range used the strain Torulopsis accumulated biomass at 70.1 to 76.8 % substrate utilization and Candida utilis at 60.2 to 70.5 % utilization. Growth rate of Candida utilis decreased at cultivation temperature higher than35 °C, while that of the strain Torulopsis even at more37 °C. At optimal growing conditions...